| **PENSION AND OTHER POSTRETIREMENT BENEFITS - Assumptions Used to Determine Projected Benefits and Periodic Costs (Details)** | 12 Months Ended |
|-------------------------------------------------------------------------------------------------------------------------------|-----------------|
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| **Obligation assumptions as of:**                                                                                             |            |   |   |
| Rate of future compensation increase                                                                                          | 2.76%           | 2.76% |   |
| **Cost assumptions for fiscal years:**                                                                                        |            |   |   |
| Rate of future compensation increase                                                                                          | 2.76%           | 2.76% | 2.75% |
| Pension                                                                                                                       |            |   |   |
| **Obligation assumptions as of:**                                                                                             |            |   |   |
| Discount rate                                                                                                                 | 3.35%           | 4.05% |   |
| **Cost assumptions for fiscal years:**                                                                                        |            |   |   |
| Discount rate to determine service cost                                                                                       | 3.89%           | 3.48% | 3.80% |
| Discount rate to determine interest cost                                                                                      | 3.75%           | 3.28% | 2.94% |
| Expected return on plan assets                                                                                                | 7.66%           | 7.66% | 7.65% |
| Other Benefits                                                                                                                |            |   |   |
| **Obligation assumptions as of:**                                                                                             |            |   |   |
| Discount rate                                                                                                                 | 3.21%           | 3.99% |   |
| **Cost assumptions for fiscal years:**                                                                                        |            |   |   |
| Discount rate to determine service cost                                                                                       | 4.14%           | 3.62% | 3.52% |
| Discount rate to determine interest cost                                                                                      | 3.62%           | 3.04% | 2.60% |

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| - Definition
DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateforInterestCost
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| - Definition
DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateforServiceCost
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.
+ References
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.
+ References
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